BBC: Scientists drilling deep into the edge of modern Antarctica have pulled up proof that palm trees once grew there. Analyses of pollen and spores and the remains of tiny creatures have given a climatic picture of the early Eocene period, about 53 million years ago. The study in Nature suggests Antarctic winter temperatures exceeded 10C, while summers may have reached 25C. Better knowledge of past "greenhouse" conditions will enhance guesses about the effects of increasing CO2 today. The...
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